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raid5: fix broken async operation chain
author
Shaohua Li
<shli@kernel.org>
Wed, 13 May 2015 16:30:08 +0000
(09:30 -0700)
committer
NeilBrown
<neilb@suse.de>
Wed, 20 May 2015 23:14:20 +0000
(09:14 +1000)
ops_run_reconstruct6() doesn't correctly chain asyn operations. The tx returned
by async_gen_syndrome should be added as the dependent tx of next stripe.
The issue is introduced by commit
59fc630b8b5f9f21c8ce3ba153341c107dce1b0c
RAID5: batch adjacent full stripe write
Reported-and-tested-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: NeilBrown <neilb@suse.de>
drivers/md/raid5.c
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diff --git
a/drivers/md/raid5.c
b/drivers/md/raid5.c
index 1ba97fdc6df1e3a6df76b42aa0e756c01644a385..b9f2b9cc60607e29c2c240b2516e5c8af49091d3 100644
(file)
--- a/
drivers/md/raid5.c
+++ b/
drivers/md/raid5.c
@@
-1822,7
+1822,7
@@
again:
} else
init_async_submit(&submit, 0, tx, NULL, NULL,
to_addr_conv(sh, percpu, j));
- async_gen_syndrome(blocks, 0, count+2, STRIPE_SIZE, &submit);
+
tx =
async_gen_syndrome(blocks, 0, count+2, STRIPE_SIZE, &submit);
if (!last_stripe) {
j++;
sh = list_first_entry(&sh->batch_list, struct stripe_head,